While I was having coffee this morning and listening to 40 meters CW I heard this station calling "CQ CQ de K2H 13 COL" at a comfortable 18 wpm. Usually short 1 x 1 call signs are assigned to special event stations. I worked the station and then looked up the call on qrz.com and confirmed that the station was indeed part of a 4th of July Special Event celebrating the independence of the original 13 colonies.
I like making contact with special event stations and enjoy collecting these one of a kind QSL cards.
more info at: http://www.13colonies.info/